<template>
    <div class="login_container">
      <div class="login_box aaa bg">
        <!-- 头像区域 -->
        <div class="avatar_box">
          <img :src="avatarUrl"  v-if="avatarUrl">
        </div>
        <!-- 登录表单区域 -->
        <el-form ref="loginFormRef" :model="loginForm" :rules="loginFormRules" label-width="0px" class="login_form">
          <!-- 用户名 -->
          <el-form-item prop="username">
            <el-input class="input" v-model="loginForm.username" prefix-icon="iconfont icon-user"></el-input>
          </el-form-item>
          <!-- 密码 -->
          <el-form-item prop="password">
            <el-input class="input" v-model="loginForm.password" prefix-icon="iconfont icon-3702mima" type="password"></el-input>
          </el-form-item>
          <!-- 按钮区域 -->
          <el-form-item class="btns">
            <el-button type="primary" @click="login">登录</el-button>
            <el-button type="info" @click="resetLoginForm">重置</el-button>
          </el-form-item>
        </el-form>
      </div>
    </div>
  </template>
  
  <script>
  export default {
    data() {
      return {
        // 登录表单的数据绑定对象
        loginForm: {
          username: 'admin',
          password: '123456'
        },
        // 表单的验证规则对象
        loginFormRules: {
          // 验证用户名是否合法
          username: [
            { required: true, message: '请输入登录名称', trigger: 'blur' },
            { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
          ],
          // 验证密码是否合法
          password: [
            { required: true, message: '请输入登录密码', trigger: 'blur' },
            { min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur' }
          ]
        },
        // 用户名和头像路径的映射
        userAvatars: {
          admin: require('../assets/user.jpg'), // 使用 require 来引入图片
        //   user1: require('../assets/user1.png'),
        //   user2: require('../assets/user2.png')
        }
      };
    },
    computed: {
      // 计算属性，用于获取当前用户名对应的头像路径
      avatarUrl() {
        return this.userAvatars[this.loginForm.username] || '';
      }
    },
    methods: {
      // 点击重置按钮，重置登录表单
      resetLoginForm() {
        this.$refs.loginFormRef.resetFields();
      },
      login() {
        this.$refs.loginFormRef.validate(async valid => {
          if (!valid) return;
          try {
            const { data: res } = await this.$http.post("login", this.loginForm);
            if (res.meta.status !== 200) return this.$message.error("登录失败！");
            this.$message.success("登录成功！");
            // 1.将登录成功之后的token，保存到客户端的 sessionStorage 中
            window.sessionStorage.setItem('token', res.data.token);
            // 2.通过编程式导航跳转到后台主页，路由地址是 /home
            this.$router.push('/home');
          } catch (error) {
            this.$message.error("登录过程中发生错误！");
          }
        });
      }
    }
  }
  </script>

<style lang="less" scoped>
.login_container {
    background: url(../assets/background.png);
    background-size: 100%;
    height: 100%;
}

.login_box {
    width: 450px;
    height: 300px;
    background-color: #ffffff71;
    border-radius: 21px;
    position: absolute;
    left: 50%;
    top: 50%;
    z-index: 9;
    backdrop-filter: blur(3px);
    border: 3px solid #fff;
    transform: translate(-50%, -50%);
    box-shadow: rgba(0, 0, 0, 0.3) 0px 19px 38px, rgba(0, 0, 0, 0.22) 0px 15px 12px;


    .avatar_box {
        height: 110px;
        width: 110px;
        border-radius: 50%;
        border: 7px solid #FFF;
        box-shadow: 0 0 10px #ddd;
        position: absolute;
        left: 50%;
        transform: translate(-50%, -50%);
        background-color: rgb(18,3,88);
        background-image: url(../assets/default.png);
        background-size: 100%;
        z-index: 9;

        img {
            width: 100%;
            height: 100%;
            border-radius: 50%;
            
        }
    }
}

.btns {
    display: flex;
    justify-content: flex-end;
}

.login_form {
    position: absolute;
    bottom: 0;
    width: 100%;
    padding: 0 20px;
    box-sizing: border-box;
}

.input{
    font-size: 18px;
}



</style>